There are dozens of tsundere characters. Dozens. I can think only of three characters with chest complex. Three. And they not even are tiny-chested.
How that constitutes a trend of tsunderes being made with small chest sizes?
No, I'm sorry. Factually, most of tsundere characters have large or average-sized breasts. Let's see Naruto characters: Ino, Tsunade, Temari... all of them are tsunderes and they are not flat-chested at all. Sakura is considered being flat-chested for some people, but if you read the manga and observe how she is drawn, it is obvious she is not.
Yes, tsundere being always or nearly always made with small chest sizes is fanon. "Everyone" tells that because everyone "knows" it is right. Right like everyone "knows" shonen=action without romance and shojo=romance and no action (in spite of it is factually untrue). Right like everyone "knows" Sakura constantly hits Naruto (one dozen of comical hits hits in over six-hundred chapter... yes, constantly). People hears someone else making those claims and repeat them without bothering in fact-checking. And so it is like fanon spreads.
You know I am a big mecha show fan? Mainly of seventies and eighties shows. People makes a ton of assumptions about those shows, but when someone actually WATCHES one of them, that person nearly always tells "It is not your average robot show!". I have heard that sentence SO MANY times about such a large number of shows I wonder what the average super robot show is supposed to be.
I don't know if you have watched Ranma 1/2 or read Ranma fanfiction, but Ranma's fandom is full of misconceptions or assumptions. Such like Kuno calling Ranma a sorceror has bewitched his -Kuno's- loves into rejecting him. Kuno is delusional, but he has never called Ranma a sorceror in canon. However you find that in every fanfiction, and Ranma fans think that happens in canon. That is what fandom is.
What really sets a tsundere off? Reasons are sundry and they are more complex than a breast size. To check it, let's examine some examples (hopefully it'll serve to steer this discussion away lewd subjects, and talking again about tsunderes in general):
Sayaka Yumi from Mazinger-Z: She has a big chest and she is ashamed of her body not at all. What sets her angry side off? Well, she is missing her mother (because she is dead) and her father because he is married to his job (she has to nearly twist his arm to force him to go home to have dinner) and he is a cool and analytical scientist has a hard work expressing his feelings. She may come across like arrogant and attention-seeking because she spends the whole time trying to prove herself to earn her father's attention and approval. Also, she is in love with an idiot jerkass constantly mockes her even when she is being nice to him. In the original manga, though, Kouji was less of a jerkass, hence she was less hot-tempered.
Jun Hono from Great Mazinger: She NEVER get angsty about her breast size, let me assure you. Her mood shifts are due to things have nothing to do with breast size or Tetsuya: she is an orphan. Her mother was Japanese and her biological father was a American black man. Since she was a child people picked on her for being a girl, being half-foreigner and being half-black. Her adoptive father has a very hard time expressing her feelings and he treats her mainly like a soldier. She is determined to be a person can stand up for herself, and she is nicer than most characters of her show, but she is full with inner tensions, and Tetsuya is real good setting her off.
Oscar de Jarjayes from Rose of Versailles: It is harder to notice here because she dressed like a man, but she is obsessed over her chest not at all. She is the main character of a series set during French Revolution, so her breasts would be the lesser of her troubles (her biggest trouble is she often wishes living a normal life instead of behaving like a male soldier the whole time).
Lum from Urusei Yatsura: she is stacked, like you can see. In fact she was meant to be a fanservice character instead of the female lead, but she became amazingly popular, forcing Takahashi to change the intended official pairing. She gets angry when the main character acts like a pervert wih any woman but her.
Madoka Ayukawa from Kimagure Orange Road: Her chest is not small at all (and the main character never teases her about her body because he thinks she is the most beautiful girl he has known. And because he likes breathing). Her parents were musicians spent the whole time traveling, leaving her in care of her older sister. She barely had friends growing up. Most boys she knew wanted getting in her pants or were frightened of her because she had shown them she can defend herself and is not shy about beating harassers. Hence, she developed a pretty lonely, and sometimes cold personality (although her mood can change very radically. She can be aloof or distant or hot-tempered and angry). She tolerates not pervert or jerks (and unfortunately that describes the ninety-nine percent of males of her high school), and she reacts to them ignoring them coldly... or beating them up if they get her angry.
Kyoko Otonashi from Maison Ikkoku: She is a beautyiful adult woman and she is never mocked over her chest. Her tensions and mood changes come from: she being a widow; her mother wanting getting her remarried if she wants or not; her father treating her like a little girl; she being the manager of a boarding house populated by meddlesome, obnoxious jerks; and the main character -who she is in love with- being an utter pushover unable to stand upo for himself.
Naru Narusegawa from Love Hina: I have just read a bunch of Love Hina chapters, so I can not talk much about her, but if I remember correctly, Keitaro had a knack for falling into situations where he seemed a pervert or a creep... and she took it very badly.
Asuka Langley Soryu from Evangelion: She has a large chest, she knows it and she flaunts it (mainly to the main character and Ryoji Kaji). Her mood shifts and bad temper are due to a bunch of inner tensions, confidence and self-worth issues and childhood trauma nobody did anything about. Her parents screwed her around, leading her to believe caring for someone else only leads to pain, so she pushes everybody away. However she also yearns for someone looking past it and showing they care despite all. The series creator stated she likes the main character, but when she flirted with him, he dodged her advances (because he thought she could not possibly be interested in him), so she believed HE was not interested in her, and in turn it got her angrier, pushing him away further. She also thought being a mecha pilot was all she had, so she strove to be the best ever so people noticed her... but then she found a barely-trained spineless wimp had a better performance... and if she wanted to admit it or not, she was in love with that weakling, who was her biggest rival.
I wish using more examples of shojo manga, but I have read way less shojo series.
Tsundere characters can get quite complex when you analyze the reasons of her behavior.
Well I grew up with some Tsunderes with complexes about their chests, and I DID NOT mean all of them do. So let me correct my self; some tsunderes have a breast complex. I was only point out that if they did That was the mentality behind why there were drawn like that. And we all know Tsunderes snap at all the things that annoy them or are deemed inappropriate; That's WHY they're tsunderes. And of course they may have complexities on why the act the way the do, I never denied it. It might be due to some kind of inferiority complex or insecurity about something, and not to mention trauma as well. So I wasn't saying Tsunderes have small chests, only pointing out if they did, it is something that that sets them in tsuntsun mode, among other things.
Edited by Phantom_999, 25 November 2012 - 03:59 AM.